I am unable to install/reinstall itunes/quicktime. I was able to use
itunes untill a few days ago but am unsure what has changed since then.
I think I do recall installing quicktime alternative, which I have
already uninstalled.

The itunes portion installs without issue. I get the following message
when QuickTime tries to load"QuickTime Installation Failed" "Error
Code -3".

I have tried to delete the contents of the Temp directory without
sucess.

Any help would be appreciated.

TIA